Louisette St-Arneault was 33 when she disappeared on June 6, 1982, from the area of the Pont Laviolette at St-Grégoire, Quebec. A witness reported seeing her fall from the Laviolette Bridge, which spans the St. Lawrence River between Trois-Rivières and Bécancour, but her body was never recovered. The Sûreté du Québec is the responsible agency and the RCMP’s Canada’s Missing database continues to list her as missing under file number 117-820606-003.

Official records preserve a detailed description: born in 1948, white female, slender build, about 165 centimetres (5 feet 5 inches) tall and 63 kilograms (139 pounds), blue eyes, short brown hair, and wearing braces on her teeth. A previous shoulder fracture is noted (the left shoulder is listed, though some wording indicates uncertainty). She was reported wearing green denim pants, beach sandals, and a cotton sweater when she vanished.

The key unresolved issue is that, despite a witness account placing her going from the bridge into or toward the river, the absence of any recovered remains means there is no physical confirmation of what happened after she fell. Anyone with information about Louisette, her movements that day, or the area around the Laviolette Bridge is asked to come forward.